Same name in other branches

1. 9 core/lib/Drupal/Core/Cache/DatabaseBackend.php \Drupal\Core\Cache\DatabaseBackend::doSetMultiple()
2. 10 core/lib/Drupal/Core/Cache/DatabaseBackend.php \Drupal\Core\Cache\DatabaseBackend::doSetMultiple()
3. 11.x core/lib/Drupal/Core/Cache/DatabaseBackend.php \Drupal\Core\Cache\DatabaseBackend::doSetMultiple()

Stores multiple items in the persistent cache.

Parameters

array $items: An array of cache items, keyed by cid.

See also

\Drupal\Core\Cache\CacheBackendInterface::setMultiple()

1 call to DatabaseBackend::doSetMultiple()

DatabaseBackend::setMultiple in core/lib/Drupal/Core/Cache/DatabaseBackend.php

Store multiple items in the persistent cache.

File

core/lib/Drupal/Core/Cache/DatabaseBackend.php, line 217

Class

DatabaseBackend

Defines a default cache implementation.

Namespace

Drupal\Core\Cache

Code

protected function doSetMultiple(array $items) {
    $values = [];
    foreach ($items as $cid => $item) {
        $item += [
            'expire' => CacheBackendInterface::CACHE_PERMANENT,
            'tags' => [],
        ];
        assert(Inspector::assertAllStrings($item['tags']), 'Cache Tags must be strings.');
        $item['tags'] = array_unique($item['tags']);
        // Sort the cache tags so that they are stored consistently in the DB.
        sort($item['tags']);
        $fields = [
            'cid' => $this->normalizeCid($cid),
            'expire' => $item['expire'],
            'created' => round(microtime(TRUE), 3),
            'tags' => implode(' ', $item['tags']),
            'checksum' => $this->checksumProvider
                ->getCurrentChecksum($item['tags']),
        ];
        // Avoid useless writes.
        if ($fields['checksum'] === CacheTagsChecksumInterface::INVALID_CHECKSUM_WHILE_IN_TRANSACTION) {
            continue;
        }
        if (!is_string($item['data'])) {
            $fields['data'] = serialize($item['data']);
            $fields['serialized'] = 1;
        }
        else {
            $fields['data'] = $item['data'];
            $fields['serialized'] = 0;
        }
        $values[] = $fields;
    }
    // If all $items were useless writes, we may end up with zero writes.
    if (empty($values)) {
        return;
    }
    // Use an upsert query which is atomic and optimized for multiple-row
    // merges.
    $query = $this->connection
        ->upsert($this->bin)
        ->key('cid')
        ->fields([
        'cid',
        'expire',
        'created',
        'tags',
        'checksum',
        'data',
        'serialized',
    ]);
    foreach ($values as $fields) {
        // Only pass the values since the order of $fields matches the order of
        // the insert fields. This is a performance optimization to avoid
        // unnecessary loops within the method.
        $query->values(array_values($fields));
    }
    $query->execute();
}

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